Notes

Acknowledgments

This study was supported by the National Science Council [NSC 96-2628-B-038-003-MY3(1-3), NSC 98-2320-B-038-006-MY3(1-3)] and DOH99-TD-C-111-008 to Dr. Ho, and [NSC 97-2314-B-038-034-MY3(1-3)] to Dr. Wu, and by the Cathay Medical Center [96CGH-TMU-05 and 97CGH-TMU-02].